The chromosomes of two Drosophila races: D. nasuta nasuta and D. n. albomicana

Ranganath, H. A. ; Hägele, K. (1982) The chromosomes of two Drosophila races: D. nasuta nasuta and D. n. albomicana Chromosoma, 85 (1). pp. 83-92. ISSN 0009-5915

Full text not available from this repository.

Official URL:

Related URL:


Heterochromatin distribution and differentiation in metaphase chromosomes of two morphologically identical Drosophila races, D. nasuta nasuta and D. n. albomicana, have been studied by C- and N-banding methods. -The total heterochromatin values differ only slightly between these races. However, homologous chromosomes of the two Drosophila forms show striking differences in the size of heterochromatin regions and there is an alternating pattern in D. n. nasuta and D. n. albomicana of chromosomes which contain more, or respectively less heterochromatin than their counterparts in the other race. -Three different N-banding patterns could be obtained depending on the conditions of the method employed: One banding pattern occurs which corresponds to the C-banding pattern. Another pattern is the reverse of the C-band pattern; the euchromatic chromosome regions and the centromeres are stained whereas the pericentric heterochromatin regions remain unstained. In the Y chromosomes of both races and in chromosome 4 of D. n. albomicana, however, the heterochromatin is further differentiated. In the third N-banding pattern only the centromeres are deeply stained. Furthermore, between the races, subtle staining differences in the pericentric heterochromatin regions can be observed as verified in F1 hybrids. On the basis of C- and N-banding results specific aspects of chromosomal differences between D. n. nasuta and D. n. albomicana are discussed.

Item Type:Article
Source:Copyright of this article belongs to Springer.
ID Code:41691
Deposited On:30 May 2011 14:30
Last Modified:31 May 2011 08:00

Repository Staff Only: item control page